diff --git a/CHANGELOG.md b/CHANGELOG.md
index 192155c..69aa9b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # @biconomy/gas-estimations
 
+## 0.2.66
+
+### Patch Changes
+
+- Set sender for estimateGas to undefined for Monad only, use EP address for other chains
+
 ## 0.2.65
 
 ### Patch Changes
diff --git a/package.json b/package.json
index 37a359d..11f56ca 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@biconomy/gas-estimations",
-  "version": "0.2.65",
+  "version": "0.2.66",
   "repository": "https://github.com/bcnmy/entry-point-gas-estimations",
   "author": "Nikola Divić <nikola.divic@biconomy.io>",
   "license": "MIT",